package com.xy.shop.common.utils;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.InputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

/**
 * @BelongsProject: IDEAWorkPlace
 * @BelongsPackage: com.qs.common.util
 * @Author: Yangy
 * @CreateTime: 2018-08-31 16:30
 * @Description:Excel导入工具类
 **/
public class ExcelImportUtil {

    private final static String excel2003L =".xls";    //2003- 版本的excel
    private final static String excel2007U =".xlsx";   //2007+ 版本的excel

    /**
     * 描述：获取IO流中的数据，组装成List<List<Object>>对象
     * @param in,fileName
     * @return
     * @throws Exception
     */
    public static List<List<Object>> getBeansByExcel(InputStream in, String fileName) throws Exception{
        List<List<Object>> list = null;

        //创建Excel工作薄
        Workbook work = getWorkbook(in,fileName);
        if(null == work){
            throw new Exception("创建Excel工作薄为空！");
        }
        Sheet sheet = null;
        Row row = null;
        Cell cell = null;

        list = new ArrayList<List<Object>>();
        //遍历Excel中所有的sheet
        for (int i = 0; i < work.getNumberOfSheets(); i++) {
            sheet = work.getSheetAt(i);
            if(sheet==null){continue;}

            //遍历当前sheet中的所有行
            for (int j = sheet.getFirstRowNum(); j < sheet.getLastRowNum()+1; j++) {
                row = sheet.getRow(j);
                if(row==null||row.getFirstCellNum()==j){continue;}

                //遍历所有的列
                List<Object> li = new ArrayList<Object>();
                for (int y = row.getFirstCellNum(); y < row.getLastCellNum(); y++) {
                    cell = row.getCell(y);
                    if(cell == null)
                    {
                        cell = row.createCell(y);
                        cell.setCellValue("");
                        System.out.println("===========================第"+j+"行:>>第"+y+"列为NULL===========================");
                    }
                    li.add(getCellValue(cell));
                }
                list.add(li);
            }
        }
        in.close();
        return list;
    }


    /**
     * 描述：对表格中数值进行格式化
     * @param cell
     * @return
     */
    public static Object getCellValue(Cell cell){
        Object value = null;
        DecimalFormat df = new DecimalFormat("0");  //格式化number String字符
        SimpleDateFormat sdf = new SimpleDateFormat("yyy-MM-dd");  //日期格式化
        DecimalFormat df2 = new DecimalFormat("0.00");  //格式化数字
        System.out.println(cell.getCellType());
        switch (cell.getCellType()) {
            case Cell.CELL_TYPE_STRING:
                value = cell.getRichStringCellValue().getString();
                break;
            case Cell.CELL_TYPE_NUMERIC:
               // System.out.println(cell.getCellStyle().getDataFormatString());
                if("General".equals(cell.getCellStyle().getDataFormatString())){
                    value = df.format(cell.getNumericCellValue());
                }else if("m/d/yy".equals(cell.getCellStyle().getDataFormatString())){
                    value = sdf.format(cell.getDateCellValue());
                }else if("0.00_);[Red]\\(0.00\\)".equals(cell.getCellStyle().getDataFormatString())){
                    value = df2.format(cell.getNumericCellValue());
                }
                else{
                    value = df.format(cell.getNumericCellValue());
                }
                break;
            case Cell.CELL_TYPE_BOOLEAN:
                value = cell.getBooleanCellValue();
                break;
            case Cell.CELL_TYPE_BLANK:
                value = "";
            case Cell.CELL_TYPE_FORMULA: //公式类型
                //value=String.valueOf((double) cell.getNumericCellValue());
                value = df2.format(cell.getNumericCellValue());
                break;
        }
       /* System.out.println(cell.getRichStringCellValue().getString());
        if (cell.getRichStringCellValue().getString().contains("\\+") ){
            String moneys [] =cell.getRichStringCellValue().getString().split("\\+");
            double money=0.0;
            for (int i = 0; i <moneys.length ; i++) {
                money = money+ Double.parseDouble(moneys[i]);
            }
            value=money;
        }*/
        return value;
    }

    /**
     * 描述：根据文件后缀，自适应上传文件的版本
     * @param inStr,fileName
     * @return
     * @throws Exception
     */
    public static Workbook getWorkbook(InputStream inStr,String fileName) throws Exception{
        Workbook wb = null;
        String fileType = fileName.substring(fileName.lastIndexOf("."));
        if(excel2003L.equals(fileType)){
            wb = new HSSFWorkbook(inStr);  //2003-
        }else if(excel2007U.equals(fileType)){
            wb = new XSSFWorkbook(inStr);  //2007+
        }else{
            throw new Exception("解析的文件格式有误！");
        }
        return wb;
    }

}
